2007 Nissan Quest Fuel Pump Relay: Location, Symptoms, and Replacement Guide

The bottom line up front: If your 2007 Nissan Quest cranks but won't start, or if it starts and then dies after a few seconds, the fuel pump relay is one of the first things you should check. This small electrical component controls the power that feeds the fuel pump inside your gas tank, and when it fails, your engine simply won't get the fuel it needs to run. Replacing the fuel pump relay on a 2007 Nissan Quest is a straightforward job that most DIYers can handle in under an hour, and the part itself is inexpensive compared to the cost of replacing the entire fuel pump. The relay is located inside the engine compartment fuse box on the right side of the engine bay, and it costs roughly $46 for the part plus about $95 in labor if you have a shop do the work.

What Does the Fuel Pump Relay Do on a 2007 Nissan Quest?

The fuel pump relay acts as a smart switch between the ignition system and the electric fuel pump. When you turn the key to the "ON" position, the engine control module (ECM) sends a low-voltage signal to the relay's coil. This energizes the coil and closes the internal switch, which then allows full battery current to flow to the fuel pump. The pump pressurizes the fuel system for about two seconds before the engine starts, and it stays powered while the engine is running.

This two-stage design protects the ignition switch from carrying the high current the fuel pump needs. It also lets the ECM shut the pump off if the engine stalls or the ignition is turned off, which is an important safety feature.

Without a working relay, the fuel pump never turns on. Fuel stays in the tank, the injectors never spray, and the engine won't fire even though the starter motor might crank fine. The electronic control relay actually performs the same job on many Nissan vehicles, and it also sends power to the fuel injectors in some configurations.

Where Is the Fuel Pump Relay on a 2007 Nissan Quest?

The fuel pump relay on the 2007 Nissan Quest lives inside the Intelligent Power Distribution Module Engine Room, which is the main fuse box located at the right side of the engine compartment. This is the large black plastic box with a lid that you'll see when you open the hood and look toward the passenger side.

To get to the relay:

  1. Open the hood and locate the fuse box on the right side of the engine bay.
  2. Press the tab on the side and lift the lid off.
  3. Look at the diagram printed on the underside of the lid. It will show the position of the fuel pump relay, often labeled "FP" or "FUEL PUMP".
  4. The relay is a small, square component that pulls straight up out of its socket.

Some vehicle guides also mention that the relay might be found near the battery or within a secondary fuse panel, but on the Quest, the engine room IPDM is the primary location. If you cannot find it, check your owner's manual for a diagram specific to your trim level.

Symptoms of a Bad Fuel Pump Relay on a 2007 Nissan Quest

A failing fuel pump relay can cause several different problems. Some are intermittent, which can make diagnosis tricky. Here are the most common symptoms to watch for:

  1. Engine cranks but won't start. The starter motor spins the engine over, but there is no spark or fuel, so it never fires up. This is the classic symptom of a relay that has completely failed.
  2. No fuel pump prime sound. When you turn the key to the "ON" position, you should hear a quiet whirring or buzzing sound coming from the rear of the vehicle, near the fuel tank. This is the fuel pump priming the system. If you hear nothing, the relay might not be sending power to the pump.
  3. Intermittent stalling. If the relay is failing internally, it might work some of the time and then drop out when it gets hot. The engine can stall without warning and then restart after a few minutes once the relay cools off.
  4. Hard starting in cold weather. A weak relay coil might not close the switch properly when temperatures drop, leaving you with a car that struggles to start on cold mornings.
  5. Engine dies a few seconds after starting. If the relay loses its connection once the current draw increases, the fuel pump can shut off shortly after the engine begins to run, causing a stall.

Keep in mind that these same symptoms can be caused by other problems, like a dead fuel pump, a blown fuse, or a security system fault. The relay is a good place to start because it is easy to test and cheap to replace.

How to Test the Fuel Pump Relay

Before you order a new relay, you should confirm that the old one is actually the problem. Testing a relay is simple and requires only basic tools. Here is a step-by-step method that works on most vehicles:

Step 1: Remove the relay from the fuse box. Pull it straight up out of its socket. Inspect the prongs for any signs of corrosion or rust. If you see buildup, clean it off with a wire brush and try reinstalling it.

Step 2: Do the swap test. Find another relay in the fuse box that has the same part number and looks identical. Headlight relays are often a good match. Pull the suspect relay out and install the known-good relay in its place. Try starting the vehicle. If it fires up, your old relay is bad.

Step 3: Use a multimeter for a more thorough test. Set the multimeter to measure resistance. Look at the diagram printed on the side of the relay to identify the coil terminals, usually labeled 85 and 86. Place the meter leads on those two terminals. A healthy coil will show a resistance reading typically between 50 and 120 ohms. If you get an "open" reading, the coil is broken.

Step 4: Check for continuity across the switch terminals. The switch side is usually labeled 30 and 87. These should show no continuity when the relay is resting. Then apply power and ground to the coil terminals using jumper wires from the battery. When the relay clicks, the switch closes, and you should get a reading of near zero ohms across terminals 30 and 87. If the relay clicks but continuity does not change, the switch contacts are worn out.

Step 5: Check power at the fuse box. If the relay tests fine, the problem might be in the wiring. Use a test light or multimeter to verify that there is power at the relay socket when the ignition is turned to "ON". If there is no power, check the fuse and the wiring.

Also, check the fuel pump fuse. A blown fuse will produce similar symptoms to a bad relay, and it takes only a minute to verify.

How to Replace the Fuel Pump Relay on a 2007 Nissan Quest

Replacing the relay is about as simple as it gets. You do not need to remove any panels or access the fuel tank.

  1. Turn the ignition off and remove the key.
  2. Open the hood and remove the fuse box lid.
  3. Locate the fuel pump relay using the diagram on the lid.
  4. Pull the relay straight up out of its socket. It may require a firm tug.
  5. Install the new relay by pressing it firmly down into the socket. Make sure it seats fully and does not rock side to side.
  6. Replace the fuse box lid.
  7. Turn the key to the "ON" position and listen for the fuel pump prime sound. If you hear it, the job is complete.

The whole process takes about ten minutes. If you choose to have a shop do it, expect to pay around $141 on average, which includes about $46 for the part and $95 for labor. Dealer prices tend to be higher, with quotes ranging between $240 and $317 for the 2007 Quest.

What to Do If the Relay Doesn't Fix the Problem

If you replace the relay and the vehicle still will not start, the issue is likely elsewhere in the fuel or electrical system. The fuel pump itself is the next most likely suspect. On the 2007 Quest, the pump is an in-tank unit located inside the fuel tank. Replacement is a much bigger job that typically requires dropping the fuel tank down far enough to access the pump assembly.

Before you go down that path, double-check these items:

  • The fuel pump fuse. If it is blown, the pump will not run at all. Swap it out and test again.
  • The security or immobilizer system. If the anti-theft system is triggered, it can cut power to the fuel pump. This might require a dealer-level scan tool to diagnose.
  • Wiring and connectors. Check the harness that runs to the fuel pump for any signs of damage, corrosion, or loose connections.
  • Fuel pressure. If the pump is running but the vehicle still won't start, you might have a clogged fuel filter or a faulty pressure regulator.

There is also a chance that the problem has nothing to do with fuel delivery. A failed crank sensor, a bad ECM, or an ignition system fault can all prevent the engine from starting even with plenty of fuel pressure. That is why proper diagnosis is important before you start replacing parts.

Preventing Future Fuel Pump Relay Failures

Relays wear out over time, and heat is their main enemy. You cannot completely prevent an electrical component from aging, but you can reduce the risk of premature failure:

Keep the engine bay clean. Dirt and grime can trap heat around the fuse box. A simple rinse with a gentle spray and a soft brush helps.

Check for corrosion. Salt, moisture, and road grime can cause the relay terminals to corrode. If you live in a colder climate where roads are salted in winter, inspect the relay every spring. Clean the prongs with a wire brush if needed.

Do not overload the electrical system. Adding aftermarket accessories that draw heavy current can stress the relay and the wiring. Keep big electrical loads off the same circuit.

Address starting issues promptly. If your Quest is cranking slowly or you are having to jump it often, the extra strain on the electrical system can affect the relay and other components.

Use a quality replacement relay. Cheap, no-name relays may work for a while, but they are more likely to fail early. Stick with a known brand or an OEM part for the most reliable service life.

Where to Buy a Fuel Pump Relay for a 2007 Nissan Quest

Fuel pump relays for the 2007 Nissan Quest are widely available. You can purchase them from:

  • Local auto parts stores. Chains like AutoZone, O'Reilly, and Advance Auto Parts usually stock these in store. You can also order them online for pickup the same day.
  • Nissan dealerships. An OEM relay from the dealer is the most guaranteed fit, but it will cost more than aftermarket options.
  • Online retailers. Sites like RockAuto, PartsGeek, and Amazon carry a wide selection at competitive prices. Make sure to match the part number from your original relay before ordering.

When you shop, bring the old relay with you or write down the part number. This ensures you get the exact match. The relay is typically a standard automotive relay that Nissan uses across many models, so cross-referencing is usually easy.

Consider the Fuel Pump Itself If the Relay Is Old

Many 2007 Quest owners find that once the relay fails, the fuel pump is not far behind. The pump has been working for nearly two decades if it has never been replaced, and its internal brushes and bearings wear out over time. If you are already pulling things apart to diagnose a no-start condition, you might want to think about replacing the fuel pump proactively.

Signs that the pump itself is failing include:

  • Whining noise from the fuel tank. A healthy pump is quiet. A worn pump often gets loud before it fails.
  • Loss of power under acceleration. If the pump cannot keep up with the engine's demand, you will feel a noticeable hesitation.
  • Sputtering at highway speeds. A dying pump can cause the engine to stumble or surge.
  • Long cranking times. It takes longer than usual for the engine to fire because the pump is slow to build pressure.

Fuel pump replacement is a more involved job. On the 2007 Quest, the fuel tank must be lowered to access the fuel level sensor unit, fuel filter, and fuel pump assembly. A replacement fuel pump module for the 2007 Quest typically costs anywhere from around $150 to more than $500 depending on whether you choose aftermarket, remanufactured, or genuine Nissan parts. The average national cost for a fuel pump replacement across all vehicles is roughly between $611 and $894 including parts and labor, according to Kelley Blue Book data.

Given that cost, it is often worth the peace of mind to replace the pump while you are already in the tank area, especially if your Quest has high mileage.

KEMSO Fuel Pump: A Dependable Upgrade Option

When it comes time to replace the fuel pump on your 2007 Nissan Quest, or if you simply want to have a quality pumping solution ready when needed, consider the KEMSO brand. KEMSO fuel pumps are built as high-performance, OEM replacement units, meaning they match the fit, form, and function of your factory part while offering reliable performance that stands up to daily driving demands. KEMSO backs every product with a lifetime warranty, giving you extra confidence that you are investing in a component designed to last.

Whether you drive a Quest or another vehicle, KEMSO offers a broad range of pump applications across many popular car, truck, motorcycle, and powersports models. Their catalog includes direct-fit pump modules for everything from Subaru and Honda vehicles to BMW motorcycles and Sea-Doo watercraft, all with the same commitment to quality.

If you are looking for a dependable fuel pump that won't let you down, visit the KEMSO website to browse their lineup and find the right fit for your vehicle:

https://www.kemsoracing.com/

Final Thoughts on the 2007 Nissan Quest Fuel Pump Relay

The fuel pump relay is one of those small, easy-to-overlook parts that can bring your whole car to a stop. On the 2007 Quest, it sits inside the engine bay fuse box where it is easy to access, and diagnosing it takes only a few minutes with basic tools. If your Quest is slow to start, stalls out, or refuses to start entirely, check the relay before you spend money on more expensive parts. A quick swap test can tell you everything you need to know.

If the relay checks out fine and your fuel pump is the real problem, plan for a more involved repair. The pump sits inside the fuel tank, and getting to it requires lowering the tank and working with fuel lines under the vehicle. It is not an impossible job for a confident DIYer, but it takes time and attention to safety, including depressurizing the fuel system, disconnecting the battery, and draining fuel down to a safe level before beginning.

Whether you are replacing the relay yourself or taking it to a professional, the information above will help you understand what is happening, what to expect, and what it should cost. The 2007 Nissan Quest is a solid minivan when it is running right, and keeping its fuel delivery system in good shape is one of the most important things you can do to keep it that way.

For more helpful guides and product recommendations, be sure to check out KEMSO at https://www.kemsoracing.com/ — a trusted source for quality fuel pumps and replacement parts.


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